Java

DSA Generate Key

See more DSA Examples

Generates a DSA public/private key pair and saves to PEM and DER file formats (both encrypted and non-encrypted).

An encrypted DSA PEM looks like this:

-----BEGIN DSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,9DAFD5C4CD62A5D0

QwDdp66sB0qKXQli7FbVcKL/eo3wu7kGRlV2sI8XbkNa1RTLiwnwTWDB0dqyWRQ8
...
Bx0HVfxKiNgCbL6BQEnYD+GOmMcckuj9Uhgloe/YuXCIDJBGhjUt/li3hvR/PXeC

V2xxNl1XKBE88njqi+UXt4vjGVNLpvXM
-----END DSA PRIVATE KEY-----

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Dsa;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Dsa dsa = new Dsa();

        // Call GenKey to generate a new DSA key.
        // The number of bits should be at least 1024 and a multiple
        // of 64.   Typical values are either 1024 or 2048.
        // DSA key generation is compute intensive and may take
        // a short while to complete.
        try {
            dsa.genKey(2048);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Extract the private and public parts to PEM or DER format
        // and save to files...

        // First for the public key...
        // The public key never needs to be encrypted.

        // Save the public key in PEM format:
        String pemStr = dsa.toPublicPem();
        // This example will not check the return value of SaveText...
        dsa.saveText(pemStr, "dsa_pub.pem");

        // Save the public key in DER format:
        dsa.toPublicDerFile("dsa_pub.der");

        boolean bPublicOnly = true;
        // Save to XML
        String xmlStr = dsa.toXml(bPublicOnly);
        dsa.saveText(xmlStr, "dsa_pub.xml");

        // ------------------------------------
        // Now for the private key....
        // ------------------------------------

        // Unencrypted PEM:
        pemStr = dsa.toPem();
        dsa.saveText(pemStr, "dsa_priv.pem");

        // Encrypted PEM:
        pemStr = dsa.toEncryptedPem("myPassword");
        dsa.saveText(pemStr, "dsa_privEncrypted.pem");

        // DER:
        dsa.toDerFile("dsa_priv.der");

        // XML:
        bPublicOnly = false;
        xmlStr = dsa.toXml(bPublicOnly);
        dsa.saveText(xmlStr, "dsa_priv.xml");

        System.out.println("Finished!");
    }
}